TKO 600 yoke seal failure

[Nigel Allen]

I have have had 2 yoke seals fail on my TKO transmission in just under 10,000 miles. This sucks. I made a nice driver to put in the last seal. It went in nice and square with no damage. I suspect the finish on the FFR supplied yoke may be poor and causing the issue, however I am no expert on these. I would have expected it to have a reasonably polished finish, say like a cam lobe, but it is not. The finish is more like it was done with a cylindrical grinder, but average.

Questions:
- Could I improve it by sanding with wet and dry?
- send it to a drive shaft shop?
- Is it okay and something else is causing the problem?

Any ideas, or educated opinions.

Using synthetic ATF.

Cheers,

Nige

[rich grsc]

Yes you could polish the yoke with some 600 wet or dry

[Presdough]

Check your pinion angle also...

[Avalanche325]

If you feel and vibration, especially on picking up or lifting off the throttle, that would be pinion angle.

[Nigel Allen]

Pinion angle is spot on at 0.5 - 1.0 degree in either axis and does not vary, due to IRS. Yoke float is approx 3/4 inch. No vibration at any speed, including 240 kmh on dyno.

[Presdough]

Check your vent tube.

[Nigel Allen]

Will do. Thank you.